阅读说明：本技术 一种珊瑚砂吹填岛礁护岸边坡水下裂隙修补方法 (Method for repairing underwater crack of coral sand blown-filled island revetment slope ) 是由 刘杰 李运舟 李洪亚 宋瑞 李政 唐洪宇 杨浩宇 杜卓兴 谢晓康 石谦 于 2020-06-05 设计创作，主要内容包括：本发明提供一种珊瑚砂吹填岛礁护岸边坡水下裂隙修补方法,包括如下步骤：步骤一、对裂隙的位置和形貌进行探测,判断裂隙大小；步骤二、安装磁性浆液引导装置；步骤三、在裂隙中灌注磁性浆液。该方法能够达到修复稳固珊瑚砂吹填岛礁护岸边坡工程的目的。(The invention provides a method for repairing underwater cracks of a coral sand reclamation island revetment side slope, which comprises the following steps: detecting the position and the appearance of a crack, and judging the size of the crack; step two, installing a magnetic slurry guiding device; and step three, pouring magnetic slurry into the cracks. The method can achieve the purpose of repairing and stabilizing coral sand reclamation island revetment slope engineering.)

1. A coral sand blown filling island reef revetment slope underwater crack repairing method is characterized by comprising the following steps:

detecting the position and the appearance of the fracture (1) and judging the size of the fracture (1);

step two, installing a magnetic slurry guiding device;

and step three, pouring magnetic slurry into the crack (1).

2. The method for repairing the underwater crack of the coral sand blown-filled island and reef revetment slope according to claim 1, wherein in the second step, a guide hole (2) is drilled on the slope, the lower end of the guide hole (2) is communicated with the crack (1), and a magnetic slurry guide device is arranged in the guide hole (2).

3. The method for repairing the underwater cracks of the coral sand blown-filled island and reef bank protection slope according to the claim 2, wherein in the third step, a grouting cover plate (3) is arranged at the position of the slope corresponding to the crack (1), and a grouting opening (4) is arranged on the grouting cover plate (3).

4. The method for repairing the underwater crack of the coral sand blown-filled island and reef revetment side slope according to claim 2, wherein the magnetic slurry guiding device comprises a hose (5), a plurality of sections of electromagnets (6) are arranged outside the hose (5), the electromagnets (6) are connected with an electromagnetic adjusting device through a lead, and the lead is arranged in the hose (5) in a penetrating manner.

5. The method for repairing the underwater cracks of the side slope of the island shelter filled with coral sand by blowing is characterized in that in the third step, mortar is firstly injected into the cracks (1) through a high-pressure grouting device (7), and after the mortar begins to flow down along the slope surface of the bank shelter, the magnetic mortar is used for grouting.

6. The underwater crack repairing method for the island shelter slope by blowing coral sand into the island according to the claim 1 is characterized in that in the third step, prefabricated mold bag concrete (8) is filled in the crack (1) and covered by a cover net (9), a grouting hole (10) is drilled from the upper part of the bank shelter slope to the bottom of the crack (1), mortar is firstly injected into the crack (1) through high-pressure grouting equipment (7), and after the mortar begins to flow down along the bank shelter slope surface, the magnetic slurry is used for grouting.

7. The method for repairing underwater cracks of the coral sand blown fill island bank protection slope according to any one of claims 5 or 6, wherein the magnetic slurry guiding device in the second step comprises a hollow rod body (11), a threaded enlarged head (12) is arranged at the front end of the hollow rod body (11), the hollow rod body (11) is installed in the crack (1), a material hole is arranged on the side wall of the lower end of the hollow rod body (11), self-expanding embedding materials form an embedded solid body (13) at the lower end of the hollow rod body (11) through the hollow rod body (11) and the material hole, a magnetized prefabricated member (14) is arranged at the upper end of the hollow rod body (11), and a magnet device 17 is arranged on the magnetized prefabricated member (14).

8. The method for repairing the underwater crack of the coral sand blown-filled island revetment slope according to claim 7, wherein the self-expanding embedment material comprises 15-30% of a rock expanding agent (calcium oxide type), 2% of fly ash and the balance of portland cement.

9. The method for repairing underwater cracks of the coral sand blown-filled island and reef bank protection slope according to claim 7, wherein the magnetized prefabricated member (14) is prepared by mixing coral sand and magnetized metal chips as aggregates by using a binder and prefabricating the mixture into blocks.

10. The method for repairing the underwater cracks of the coral sand blown-filled island and reef revetment slope according to claim 1, wherein the magnetic slurry comprises cement mortar, magnetic particles, an active agent, a flocculating agent and a dispersing agent, and the specific mixture ratio is as follows: 10-30% of magnetic particles, 6-9% of an active agent, 5% of a flocculating agent and 2% of a dispersing agent, and the balance of cement mortar doped with coral powder sand, wherein the cement mortar comprises, by mass, coral powder sand, silicate cement and water =0.5:1: 1.

Technical Field

The invention relates to the field of island protection and repair construction, in particular to a coral sand reclamation island revetment side slope underwater crack repairing method.

Background

The hydraulic fill island reef revetment project is a containment project measure manually built on an island reef bank slope, and comprises a revetment retaining wall, a coral sand hydraulic fill body, a construction cofferdam, mold bag concrete and other project partitions, can defend against the invasion of stormy waves, water flows and sea tides, elutriation and underground water action, maintains the stability of the hydraulic fill island reef, resists the action of marine geological environment and keeps good service performance and appearance integrity for a long time, namely the hydraulic fill island reef revetment project and durability has important significance for maintaining the safety and normal use of the revetment project.

But obvious strength and rigidity mutation exists among engineering subareas such as a reef limestone foundation, a bag sand cofferdam, a calcareous sand reclamation body, a mould bag concrete revetment, a concrete revetment retaining wall and the like, the differentiation characteristics of subarea scouring resistance and elutriation resistance are obvious, and the defects of cracking, elutriation cavities and the like easily occur at subarea combination parts such as mould bag concrete and the revetment retaining wall, mould bag concrete and the reef limestone foundation and the like; the ocean power action of the wave-facing surface and the inside of the bank protection project is different, the wave-facing surface of the mould bag concrete bank protection is easy to have defects of pitted surface, holes, cracks and the like under the action of wave current loads such as strong current upwaves and the like, and the compactness of the inside of the bank protection is changed and the washout holes are formed under the action of the dynamic water pressure difference on the inner side and the outer side of the bank protection project, so that the cracks of the mould bag concrete bank protection from inside to outside are caused to appear. Therefore, the problem of bank protection slope cracks is a key factor for maintaining the safety and normal use of the bank protection project.

Disclosure of Invention

The invention aims to solve the technical problem of providing a method for repairing underwater cracks of a coral sand blown-filled island reef revetment slope, so as to fulfill the aim of repairing and stabilizing a revetment project.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a coral sand blown filling island reef revetment slope underwater crack repairing method comprises the following steps:

detecting the position and the appearance of a crack, and judging the size of the crack;

step two, installing a magnetic slurry guiding device;

and step three, pouring magnetic slurry into the cracks.

In a preferred scheme, in the second step, a guide hole is drilled on the slope body inclined plane, the lower end of the guide hole is communicated with the crack, and a magnetic slurry guide device is arranged in the guide hole.

In a further scheme, in the third step, a grouting cover plate is arranged at the position of the slope body corresponding to the crack, and a grouting opening is formed in the grouting cover plate.

In a further scheme, the magnetic slurry guiding device comprises a hose, a plurality of sections of electromagnets are arranged on the outer side of the hose, the electromagnets are connected with the electromagnetic adjusting device through leads, and the leads penetrate through the hose.

In the preferred scheme, in the third step, mortar is firstly injected into the cracks through high-pressure grouting equipment, and after the mortar begins to flow down along the bank protection slope surface, magnetic slurry is used for grouting.

In the preferred scheme, in the third step, the prefabricated mould bag concrete is filled in the cracks, the cracks are covered by using a cover net, grouting holes are drilled from the upper parts of the side slopes of the revetment to the bottoms of the cracks, mortar is firstly injected into the cracks through high-pressure grouting equipment, and after the mortar begins to flow down along the slope surface of the revetment, the mortar is then poured by using magnetic slurry.

In a further scheme, the magnetic slurry guiding device in the second step comprises a hollow rod body, a thread expanding head is arranged at the front end of the hollow rod body, the hollow rod body is installed on a slope body above the crack, a material hole is formed in the side wall of the lower end of the hollow rod body, a self-expansion embedding material forms an embedding body at the lower end of the hollow rod body through the hollow rod body and the material hole, a magnetization prefabricated member is arranged at the upper end of the hollow rod body, and a magnet device is arranged on the magnetization prefabricated member.

In a further scheme, the self-expansion embedding material comprises 15-30% of rock expanding agent, 2% of fly ash and the balance of portland cement.

In a further scheme, the magnetized prefabricated member is prepared by mixing coral sand and magnetized metal chips serving as aggregates by using a binder and prefabricating blocks.

In a preferred scheme, the magnetic slurry comprises cement mortar, magnetic particles, an active agent, a flocculating agent and a dispersing agent, and the specific mixture ratio is as follows: 10-30% of magnetic particles, 6-9% of an active agent, 5% of a flocculating agent and 2% of a dispersing agent, and the balance of cement mortar doped with coral powder sand, wherein the cement mortar comprises, by mass, coral powder sand, silicate cement and water =0.5:1: 1.

The method for repairing the underwater crack of the bank protection side slope of the reef island filled with coral sand has the following beneficial effects:

1. the construction method provided by the invention has different repair schemes for different revetment slope crack development morphologies, is simple to operate and high in construction efficiency, and greatly improves the safety reserve of the revetment project; the coral sand aggregate is made of local materials, so that the cost is greatly saved, and the economic benefit is improved.

2. The invention adopts magnetic slurry, realizes the guiding flow and underwater self-convergence of the mortar under the guidance of electromagnetic or permanent magnetic equipment, can regulate and control the viscosity in real time, and is anti-caking, anti-segregation and the like.

3. Through setting up magnetic slurry guiding device, make magnetic slurry adsorb around the magnetic slurry guiding device, through electromagnetic adjusting device to the periodic switch adjustment of magnetic force size, drainage drives gas, forms one kind and can resist the erosion of running water, compact and high-strength's grout body structure.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic illustration of the elutriation fracture repair of example 1;

FIG. 2 is a schematic structural view of a guide device used in embodiment 1;

FIG. 3 is a schematic illustration of the elutriation fracture repair of example 2;

FIG. 4 is a schematic illustration of the elutriation fracture repair of example 3;

fig. 5 is a schematic structural view of the guide device in embodiment 3 or embodiment 4;

in the figure: the device comprises a crack 1, a guide hole 2, a grouting cover plate 3, a grouting opening 4, a hose 5, an electromagnet 6, high-pressure grouting equipment 7, prefabricated mould bag concrete 8, a cover net 9, a grouting hole 10, a hollow rod body 11, a threaded expansion head 12, an embedded body 13, a magnetized prefabricated part 14, a bag sand cofferdam 15, a slope mould bag concrete layer 16 and a magnet device 17.

Detailed Description